Oracle分頁查詢

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mysql

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select * from table_name limit 從第幾條取,取幾條

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sql server

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select top 4 * from 表名 where not in(select top 4 * from 表名 where 條件);

排除前4條，再取4條

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oracle

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--第一層

select * from emp;

--第二層

select t1.*,rownum rn from (select * from emp) t1 where rownum<=12;

--第三層

select t2.* from (select t1.*,rownum rn from (select * from emp) t1 where rownum<=10) t2 where t2.rn>=6;

int startindex; 開始位置

int pagesize; 取的條數

select t2.* from (select t1.*,rownum rn from (select * from emp) t1 where rownum<=(startindex*pagesize)) t2 where t2.rn>=((startindex-1)*pagesize+1);

測試：--建立新錶查入另一張表的資料

create table mytest as select empno,ename,job,sal,comm from emp;

--自我賦值資料[多次執行]

insert into mytest(empno,ename,job,sal,comm) select * from mytest;

select t2.* from (select t1.*,rownum rn from (select * from emp) t1 where rownum<=10) t2 where t2.rn>=6;

select t2.* from (select t1.*,rownum rn from (select * from emp) t1 where rownum<=300010) t2 where t2.rn>=300000;

分別檢視所執行的時間

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